Mine are in varying states, and have never been messed with. I'm not sure how they manage to find plastic that denatures so rapidly in the sun as 'erosion mustard' PTO cover material. The black ABS types seem to hold up much better. I haven't replaced the covers, and am no more or less terrified of the PTO's ability to tear me up. When I have to run off the seat I'm aware there's an engine driven shaft running the implement, so I don't get close enough to fall into it. If folks really want to 'prevent' risks of injury from PTO shafts, pulleys, chains, and winches, they need to be guarded with solid material you can't break--steel mesh or solid. Most safe is avoiding power equipment altogether.
The trade-off of guarding is ease of accessibility and maintenance--thus a flimsy plastic piece that degrades in the sun meets the manufacturer's legal needs: worked fine when they got it. Replacement parts available biannually--for a modest fee.
The trade-off of guarding is ease of accessibility and maintenance--thus a flimsy plastic piece that degrades in the sun meets the manufacturer's legal needs: worked fine when they got it. Replacement parts available biannually--for a modest fee.